James and His Life-Partner Mikael Work for the Same Company

James and his life-partner Mikael work for the same company. James was recently denied a promotion into a department in which Mikael would be his supervisor. The reason cited for denying James was that the promotion was not allowed under the company's nepotism policy. James believes he has been unfairly denied the promotion. He can:

A) sue for sex discrimination under Title VII.
B) sue for sexual harassment under Title VII.
C) sue for disability discrimination under the ADA.
D) sue under civil law.
E) none of the above.